Force-sensing catheter with bonded center strut

a force-sensing catheter and center strut technology, applied in the field of medical devices, can solve the problems of not providing a means for accurately providing force sensing and no teaching with respect to sensing force at the tip of the catheter
US20100063478A1Active Publication Date: 2010-03-11BIOSENSE WEBSTER INC
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
BIOSENSE WEBSTER INC
Publication Date
2010-03-11

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Abstract

A force-sensing catheter for diagnosing or treating the vessels found within a body or body space includes a center strut that is bonded, preferably thermally, along its longitudinal axis with the thermoplastic tubular member within which it is housed. The tubular member preferably has three layers: an inner layer, a braided layer and an outer layer. One or more semiconductor or metallic foil strain gages are affixed to the center strut in order to provide a measure of the bending and torsional forces on the distal tip of the catheter. Temperature compensation is achieved by having a temperature sensor near the strain gages and calibrating the catheter over a range of temperatures.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to a medical device for use in the vessel of a patient for the purpose of diagnosing or treating the patient, such as mapping tissue and / or ablating tissue using radio frequency (RF) or other sources of energy. More particularly, the invention relates to a catheter having a center strut bonded into the catheter tip to define an inseparable composite tip structure that maximizes the open internal volume of the catheter tip and the torsional rigidity of the catheter tip while minimizing the outside diameter of the catheter tip and providing uniform on-plane tip deflection. On the bonded center strut one or more strain gage force sensors are affixed for measuring catheter tip deflection and tip axial and side forces. The catheter may also include puller wires for deflecting the tip portion of the catheter.BACKGROUND OF THE INVENTION

[0002] Many abnormal medical conditions in humans and other mammals have been associated with disea...

Claims

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